I hate to say anything nice about insurance companies, but they give rebates for certain levels of competency through training, as well as an aware worker is not as likely to get injured. Couple this with the companies who actually back up the "do it safe, or leave" mentality, and the guys know that you are serious. Some of these things combine to make classes (which of course we would have NEVER gotten back in the 70's) a bit more prevalent today.